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arXiv 1903.04875nucl-th
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中子星研究中EOS表的适用分辨率

Suitable resolution for EOS tables in neutron star investigation

Houyuan Chen, Dehua Wen, Na Zhang

摘要:

由于内部中子星的流体静力学结构唯一地依赖于物态方程(EOS),天体物理观测对EOS的逆约束一直是揭示高密度物质性质的重要方法。迄今为止,大多数中子星物质的观测数据都是以表格的形式给出的,但这些表格的分辨率可能相差很大。为了保证TOV方程计算的精度和效率,本文研究了一种生成具有合适分辨率的EOS表的简明标准。结果表明,在超核密度段($ρ_{0}, 10 ρ_{0} $,$ρ_{0}$为核饱和密度)上均匀分布50个点的状态方程表,对应于引力质量$M$在$\sim 0.02\%$和潮汐变形能力$Λ$在$\sim 0.2\%$的插值误差。

英文摘要:

Inasmuch as the hydrostatic structure of interior neutron stars uniquely depends on the equation of state (EOS), the inverse constraints on EOS from astrophysical observation have been important methods to reveal the properties of the high-density matter. Up to date, most of EOSs for neutron-star matter are given in tabulations, but these numeric tables could be quite different in resolution. To guarantee both the accuracy and efficiency in computing Tolman-Oppenheimer-Volkoff (TOV) equation, a concise standard for generating EOS tables with suitable resolution is investigated in this work. It is shown that the EOS tables with 50 points logarithmic-uniformly located at supra-nuclear density segment [$ρ_{0}, 10 ρ_{0} $], where $ρ_{0}$ is the nuclear saturation density) would correspond to the interpolation-induced errors at $\sim 0.02\%$ for the gravitational mass $M$ and $\sim 0.2\%$ for the tidal deformability $Λ$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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